Superimposing TGraphErrors

Pedro_Rossini · January 6, 2018, 11:40pm

Hi,

I’m trying to superimpose 2 graphs and having some problems. I’ve already done it before, but with different draw options. Now, the first is “AP” and the second, “a3” (the error bars are shown as a band). The problem is: only one graph is drawn, and not both at the same time… My goal is to do something like the picture.

amvargash · January 7, 2018, 12:48am

You can use TMultiGraph.

Pedro_Rossini · January 7, 2018, 1:16am

I’ve tried, but without sucess

amvargash · January 7, 2018, 1:57am

Could you please post the script you tried? It’s difficult to help without knowing what you have done so far

Wile_E_Coyote · January 7, 2018, 8:45am

“A” means “create new axes” so, the second graph should not have this option.

Pedro_Rossini · January 7, 2018, 10:38pm

Hi,

Here’s the script I’m using:

evolution.cpp (1.2 KB)

amvargash · January 8, 2018, 12:39am

Hi @Pedro_Rossini. Just change the order:

Do:

mg->Add(gr2,"a3");
mg->Add(gr,"AP");

Instead of:

mg->Add(gr,"AP");
mg->Add(gr2,"a3");

You were hiding gr behind gr2;